Feed-control mechanism for reciprocating-type machines



Sept. 7 1926. l H. J. CALDWELL FEED CONTROL MECHANISM FOR RECIPROCATINGTYPE MACHINES Filed Oct. 17. 1921 4 Sheets-Sheet l L am Sept. 7 1926.

H. J. CALDWELL FEED CONTROL MEGHANISM FOR RECIPROCATING TYPE'MACHINESFiled oct. 17, 1921 4 Sheets-Sheet 2 gg-mfg 22 Sept. 7 1926.

H. J. CALDWELL FEED CONTROL MECHANISM `FOR REGIPROCATING TYPE MACHINES 4Sheets-Sheet i5 Sept. 7,1926. 1,599,204

H. J. CALDWELL FEED CONTROL MECHANISM FOR RECIPROCATING TYPE MACHINES .9P4P/p 22 m E 7;; y REVERSE.

RAP/D Q RE VERSE.

Filed oct. 17, 1921 4 sheets-.sheet 4 Patented Sept. 7, 1926.

.l s f '1,599,294

HARRY J. CALDWELLQOERQCKEOBD, IiiLINoIv-s, l-assisfivonrro PHE INGERSQLLMimi;l -v INGMACHINE coMrANY, ornocxronio, ILLiNoIs, A conroRAfrioN onILLINOIS:

FEED-CONTROL ivrEoHANIsM fron nEoIPRocaTING-TYPE Mii(nimes.` l

. t Appucatmniiied octoier i7, 1921. seriali No'. 508,374.

This invention relating to mechanism forV imparting movement toatraveling support, suclras a Work-carrying table, and' Vforautomatically .controlling `movements of *the* table, is an improvementon the invention disclosed in my companion application', Se-

rialNo. 508,375, filed Got. 17', 1921. Said application discloses novel'mechanism` lfor. feeding a Work-carrying table at relatively fastl andVslow speeds in both directions lin Vany ofvarious continuous cyclesaccording to the location ofcam dogs on the tablel which actuatechange-speedl and reversing devicesk for obtaining the several feedYmovements.'

In said application, the chaiige-speedgdevice and the reversing deviceis each actuated by a separate set of'cam dogs and operatinglconnections, `whereas iny the. present inventionv aV single set of camdogs actuates a movement-train for effecting' bothchange` in speed f anddirection oftravel of the table.

feed and control mechanism of the character described.

Another object is toproyide afeed and controlmeclianism in Ywhichvthefeed of the reciprocating table or other traveling supportmaybecontrolled with greater accu racy and precision. y t

Other objects and `attendant advantages will be appreciated by thoseskfilledin this art as the invention becomes better understood byreferenceto the following` description when considered in connectionwiththe.

accompanying drawings, in which- Figure l isa front elevation ofarecipro" cat-ingr type milling machine embodying my.

invention ;l

Fig.2is a fragmentary plan -viewtaken substantiallyy on the line-2 2 ofFig. 1;

Fig. 3' is a' horizontal section through the gear. box containing thechange-"speed andA reversing clutches; y

- Fig. l is a section'through the gear. hoX

taken .Substantially on theV line 1 -4 of andc rollercycle;

10 andll are related4- diagrammatic v viewsfshowing the positions ofchange-speed and reversing clutches andv the' control parts ia and: ilare. similar rented of related diagrammatic 'views showing. ferentpositions of the tahle-feed'mecl'ianism and Vcontrol mechanism,whichjwill be more",

fullfyfexplained hereinafter. f Y, 4, y Iiithe present example,myinventio nis.

' illustrated in connectionwith afreciprocating type milling. machine,,that is. one inwliich thefwork iscaried. on al tabler which,l movesvbja'cli and forth past the cutting toolortools.

My invent-ion hasV reference to vthe. mecha-l nisin for feeding7 theworlrtableor theiequivalent hack and: forth at` relatively fast; andslow speeds during each` stroke' and;

tions, and it haspfurtherf `reference .to j the'. meansactuated by canisonzthe tahlefor cony A y pil feraably in acontinuoiis-cycle comprisingrapid traverse and feed movementsin both direc.k

The primary object of the present i-nven-. tion is therefore, tolsimplify and improve a.

are', generallyV applicable tothe operationj or cont-rolfl ofl any workor. tool carrier which inovesb'aclr'and forth.` 1` t The frameI offfthepresentinachine coin-.- prises an elongatedfbed Qliipon whicl'na worktable y22'ismounted*to reciprocate horizontally. vThe bedfaiid;r tableare lof conf veiitional.l construction, thef-table v v befifig.'

mounted ontheusualliat bearings andfbeingt* v propelled` lhy 'meansof..i ya screw 23:1held against Vaxial translation on-tlie hedandengaiginga nutQ-l carried the table. In the present example, avertical cutter spindle 25 mounted on any overhead fraine 26' sup.-

ported byiside housings?? carries. a inillingcutter 28.. The sidehousings are positioned midwayhetweeii vthe ends ,of thelfbedj` so thatthe work .table can" he conveniently.,I loaded when at either end ofthebedf Itgsliouldlbe understood, however, that a Vplurality vof cut-Y tersmight be employed, mounted i, a-t,aii y desired posit-ion on the side.housingsor topy frameand that. the.p'illustration` of ajsing'le`verticalcutter is simply one examplef'forthe" 1";3

purpose of showing. a! completefcycle lof', op-

eration-fand the aditan/tages.of` the present g y construction. i i

Myfinvention contemplates provision of suitable mechanism k*foriVrevolving: the* table-propelling screw at different ,speedsv "andl forreversing the screw; also the provision of novel means operated by'asingle dogor cam-actuated element for controlling the movement ofboththe change-speed andY reversing*device/s. ln the presentexainple, theVtable vis propelled ,by a vtrain ofV gearincluding.change-speed andreversingclutches. 1 l'n practice, the clutchesand the immediate gearingare contained in a gear box or housing 29.' This gear box and theenclosed gearing and clutches are preferably constructed as aunitassembly adapted to be .applied to different machines of the ample as abeltdriven pulley 33 adapted to' be connected to the shaft through theagency of a clutch 34 which maybe shifted froml the front of theAmachine by operation Aof the lever 35. The driven shaft 32 is connectedto the .screw 23V through the agency of suitable chance-speed reductiongears (not shown) in the housing 30. ln operation, th-e driving shaft`3l revolves continuously one direction and through the agency of thegearing and clutches between'the driving and driven shafts, the latterwill be driven in opposite directions and at different speeds forcorrespondingly 'propelling thev work table 22. As shown in Figs. 3 and4, there is loose on the driving shaft V31, .a pair of opposedbevel'gears 36` and 37, .and an in? terniediate clutch eleinent'33Vsplined4 on the shaft and adapted .toV be shifted in either` directionfor connecting its clutch teeth with the coinplemental teeth on therespective bevel gears 36 and 37. An intermediate bevel gear 39 mesheswith both the gears 36 and V37 and is fixed toa worm shaft 4l whichcarries a fixed worm screw 42. The shaft 4l also carries a fixed b-evegear 43 `meshing with a bevel gear 44 fixed to an in-V termediate shaft45, toV which is fixed a spur gear 46 meshing with a spur gear 47 looseon the driven shaft 32. A. friction element 48 is inter-posed betweenthe shaft 45 and gear 46`for absorbing sudden shocks or strains when thespeed is suddenly stepped up.v rThe worm screw 42 meshes with a worin 49loose on the driven shaft32. The clutch elem-ent 5l splin-ed on theshaft 32 is adapt` ed to bev shifted in 'opposite directions to engagethe clutch teeth at its ends with coinpleniental teeth on th-e gears 47andv 49.` A rock .shaft V52 carries a lever 53 within Vthe gear box, oneend 54 of which` lever is forked and in operative conn-ection with ktheclutchv element 571 vfor shifting the latter,

iseaeoa gaging the clutch element 33 for shifting -the latter, .andlikewise carries a springpressed plunger 62, the surfacesl 63' and 64 ofwhich are adapted to-respectively engageV the stationary rollerl 65,v aswill Ybe pres-ently described.

- From the foregoing, itl will be evident that .l

when'the driving shaft 31 is rotated in 'a clockwise direction viewingthe right hand side of Fig. 3, with the clutches as shown therein, theshaft 32 will be driven in a similar direction through the agency ofgears 36, 39 43, 44, 46 and 47 at the rapid traverse speed. rJhel worm`gear 49, will howeverp be revolved in the opposite directionbyrreversalV through the worm screw42. If the clutch eleinent 33 beshifted,v to Vconnectthe gear 37 to the rdrivin-g` shaft withoutrshifting the clutch element 5l, th-e rapid traverse drive willobviously be reversed. By shifting the clutch element 5l to the oppositepon vsition the worin gear 49 will be connected to the Vdriven sha-ft 32and the latter will be driven at the .Slow or feed speed in a counterlclockwise direction, because yof the fact that the worm wheel 49revolves in the opposite direction from the worin wheel'49'will bereversed andthe shaft 32 will be driven in the same direction(clockwise) as previously driven bythe gear 47, but at a reduced.spe-ed. This distinction is noted at this point, because as will beexplained later, the clutch elements are shifted simultaneously from asinglev rcam the rapid traverse gear 47. if however, bothV clutchVelen'i'ents 38 andv Y5l are simu taneously thrown to the right 100 dogand L'hrough 'a single motion-train or V dogs 63, 69, 71 and 72, and isconnectedA by a rod 73 to an arm 74 fixed to the rock shaft 52 described*l above. More particularly, the rod 73 isfslidable lengithwise,V

ina sleeve 75 vwhichris pivotally connected onv a vertical axis to theouter end of the arm 74. The rod 73 carries a pair of adjustableabutments 7 6 Vand 77-between the latterA of which and the sleeve 75 areinter` posed coil compression springs 7 8 and 79, as

shown in Fig. 2. .Means is now provided operable between the rock shafts52 and 59, whereby the latter will be oscillatedatevery alternateoscillation of the former for a pur- Y pose which will be'presentlyapparent; I This means comprises a pair of bell cranks 81'y and 82, theformer `of which is fixed to the:

rockshaft y59 and .the latter to a stationary pivot 83, and the arms 81of which are con.-

nected and` held in parallel relationV by ra link 85.. Theother arms 86'of the levers 81 and 82 are provided respectively withV up- Theselugsare standing lugs 87 and 88. adapted to be independentlyengagedbyfahooked member 89..pivotally connected'to the above mentionedarm 74.4 Flat springs 93 and 94 carried by the link 85 'are respectivelyadapted at certain times in the operationl to urge and hold the hooked'endof the member 89 in connection with either;

one orv the other of theflugs 87 and 88.

. T- he operation islas follows:v Referring to. Figs. 5, 10 and'll,which show an assumed position fof related operated parts, it will be Yobserved that the dog 68 has just moved the roller 67 upwardly to the'plane 95 land ythereby moved the clutch elements 5,1 tothe positionshown in Fig. 11, causing theptable to be propelled to the right viewingFigs.

5 and 10, in therrapid traverse movement.

At the time the roller 67 was actuated to produce this movement thecutter r`28 hadv completed milling a work-piece 96, p and during themilling of this work-piece anunfinished work-piece 97 hasbeen-mounted onthe opposite end ofthe table. .In this position'the clutch elements38and 51 areheld engaged by the action of their [respective springplungers 62 and 55 co-'o'perating with the stationary rollers 65 and 58.'It will be observed that in this positionV the hooked` member 89 isconnected with the lug 88 and held ,so bythe spring 94. 'As `the tabletravels to thev right at a rapid speed'for bringing the work-piece 97 tothe. cutter 28,

the roller-67 whichjis disposed inthe pathv of the upper end of :the dog69 will be forced upwardly by said dogto the clear- 'ance positionindicated by dotted lines in will move the roller 67 downwardly totheplane 98 as shown. inrFigs. and 12 for the purpose of reducing thetravel ofthe table toj the slow speed or feed just prior to the timethework-piece 97v reaches the-cutter. The dog 67 in being moved to thisposition will compress the spring78and carry the abutment (6 intocontact` withthe adjacent end of the sleeve 75, thereby withdrawingtheclut'ch element 51 fromthe vrapid *traversev gear 47 and likewisewithdrawing the clutch element 38 from'the gear 36. This movement is notsuicient, however,to throw' This dog-clearance movement is comvthe feedof the table',

the plungerlevers,y 53 .landfi'61r beyondv the.. 'i

dead-center vpositions with' 'relation' to' their, respective rollers 58andv 65and thepressure storedup by the compressed spring isutilized AtoV,move the sleeve 7 5to the rightp vievvingjFig. 12, yon the rod"73,rvthereby swinging both levers 53 and 61Y beyond said*V dead-centerpositions, whereupon the springpressed plungers carried'bv said`leverswill i function together withftherpressure ofthe 14.Thisestablishes slow speed orfeed in the same direction. Itywillbe'noted that this action Aby the, cam dog 71 causes both. clutchV.elements 38 vand 51 Y to be simul- `vspring`78 for engaging theyclutch elements with the gears 37 and 49, asshownin Fig'. 1

taneously'shifted by` a vsingle motion-train,`

it` vbeing observed thatthe hooked member 89 is held-in connection withthe lug 88,? thus" establishing operating.V connection ,between f bot-hclutches.v Motion trainiis'used -hereinf as meaning a mechan1cal1 trainof parts.,

through fwhich motion is adapted tofrbe!4r transmitted'from an operatingpart: to one or more operated parts, atpr'esent the operatingpart being'a bellcrank leveradapted to be actuated bv one or-more cam dogson 7 atraveling supporter work tablevand'the@` Operated part `or parts beingVone or more clutch rShifters included ina table propelling mechanism.The feed? continues to the right untilfthe worktable vvreaches theposition shown inFigs. 7 and 15, when the rollerv'67 will be movedupwardlvfbv the cam do-g` 72,x

thereby shifting only ythe clutch ele1nentj51l to connect fthe gear.'Ll-7 toithe drivenshaft for `effecting rapid; reverse7 of the table'.It willy `be observed. that in this .operation the hooked member 89yhasbeen swung clear ofl the ilug 88V andV into Vengagement with the j lug87, aided by the spring 93, this without disturbing the ,position of theclutch element 38 so that upon the'neXt succeeding operation oftheclutch operatingfmotion-train,i the clutch element 38y will be shifted.yItv will also be observed that in this operation7 ico.'v v

as in every yclutch shifting operation, either the spring 78 or 79' asthe case may be,.func f tio-ns to throw one or both oftheplungercarrying levers 53 and 61l pastV the dead-` center positions,andthat s'aid'springsper- T mitl the roller`67 toclear the endsofthedogs in idle clearance movements.' Vhile"v the work-piece 97 was beingmilled, a new work-piece 96 'will have been loaded` onto the oppositeend of the'ta'ble. "The rapid reverse effected Vbythev dogv 72,' orrather the rapid traver'seft'o the'left,continues until the work-piece96 reachesl the cutter as shown-l in Fig. 8, whereuponthe roller`67`will be thereby moving the clutch operating motion-train to shift-bothlclutches as shown inj;

Figs.A 17 and 18, to veffect sl'aeedreduction -or By this action'-off-'the cam dog 69, bothrclutch elements 38 and 5l willi'b'e shifted,it'being observedthat the hoolred'member 89 operates in this instance onthe lug 87 and thereby shifts the clutch element 38 in the' oppositedirection'from the operation Vvexplained above, with refer-Y ence tothelug 88. The feed continuesun- Y til the cam dog 68 effects rapid reverseas shown in Figs, 10 and il byshifting only lthe vclutch element 51.Yrfhis completes the cycle, which Will be continuously repeated until theoperator throws out the driving clutch 34. l

Attention is now directed to tlie'operation of the motion train betweenthe dog-oper ated roller 67 and the clutches.

,Y versal .of drive are effected through oper- Y ation Vof-this singlemotion-train bysuccessive back and forth movement ofthe roller loythecam dogs. At each operation of the roller, however, both clutches arenot operated.. By reason of the action of the inter- `mittent connectiondevice'between' the rockshafts 52 and 59, the clutch elements 38 will beshifted only upon each alternate shifting of the-clutch elementv 5l'.That is, as eX- plained above, only the clutch elementV 5l is shiftedwhen Veffecting rapid reverse;

Whereas both clutch velements are shifted to obtain speed reduction tothe feedin the same direction of travel' as the. rapid travei'se. Byreason of a feed control mechanism embodying the principles disclosedherein, the change-speed and reversing` movements in a table propellingmechanism mayl be. controlled by a single vset .of camr dogs ortheequivalent, kConsequently not only simplifying the constructiony butalso enabling greater accuracy in c-ontrol of the table movement. Whileprecision in the limits defining the rapid traverse and 'feed movementsis not always essential in ma-A chines of this character, nevertheless,iiiv some classes ofworlr, such for example asillustrated*diagrainmatically bythe workpieces 96 and 97, in whichthefeed Vmust be stopped at a given point to prevent intereV ference ofthe cutterwith an upstanding or obstructing` portion of the work-piece,it is very essential that the reversing and changespeed mechanism becontrolled in a positive `manner and so that injury to the machine orparts will not result by carelessness or mistake Vin setting the camdogs, or parts of the control' mechanism.

it is believed that the foregoing conveys a clear understanding of theinvention, and While l have illustrated but a single working` embodimentit should be understood that .considerable change inightvbe made inconstructionandA arrangement without depart ingvfrom the spirit andscope of the invention as expressed'in the appended claims;

Ifclaimzy j f It will be s observed that'the changes in speed and re-Vl. Control mechanism 'off the characterdescribed comprisingr atraveling suppoitV mechanism for propelling the support at differentspeeds and in different directions, a motion.-transinitting partadapted. to be movedbacl;v and VV'forth' iii a single plane by movementof said support, and ,means operated by such movement of said part forcontrolling the operation of said propelling mechanism to effect eachchange of direction and change of speed in each direction..

'.ihe combination traveling support, mechanism for moving the supportbackfand forth in a continuous cycle atrapid traverse .ng aVchange-speed and a reversing device, i.iid a motion-train connectedwith. said devices 'and'operated by a part'movable back and forh in asingle plane by the traveling" support for opcratinglboth saidchange-speed andV reversing' devices to effect reversal of the drive andincrease in speed when moved inone direction and reduction of speedvwhen moved Vinthe opposite direction. Y Feed controll mechanismcomprising` avtraveling support, reversing and changesp'eed .clutchesfor propelling ythe support, cani dogs on the support, and motion-trainactuated by a single-partadapted to be moved in one'diiection ina'giveii plane by Ysaid dogs foroperating said clutches-to effeet rapidreverse of the support at each end of its travel and to be mei/ed in theopposite directionfiii said plaiie'by said dogs fory operating saidclutches to effcctreduction of the speed of the support during travelthereyof inr both directions. Y y 1 a. Feed control mecl'ianismcomprising` a traveling support, mechanism for propelling said.supportincluding ahchange speed clutch and a 'reversing clutch, cam dogson the support, and amotioii-train having` a single Vop'- .erating'partadaptedto be actuated by said its travel in each direction, mechanismforl so propellingsaid support including aV change-speed device andareversing device,

cams `on saitL support` and a ysingle element' f for operating both saiddevices adapted to'be inovedin a single Yplane by said cams in one mdyfeed speeds 4in both directions includL 'lio direction for effecting'said rapid reverse and in the opposite direction said speed reduc-Vtion. f

6. ldeed control mechanism of the charac-A ter describedcomprising atable adapted to be moved back and forth, mechanism foripropclling saidtable includingia. change speed clutch iso5 moved back :and forth in asingle plane by saidrcam dogs7 l"andmechanism operated said 'singleelenientfor Vincreasing the speed and 'changing' the direction of travelupon movement of said' element yinl one `direction in said plane fand're'ductionof speed upon movement `ofi said I element .in the oppositedirection :in :said plane. v

v8. The combination offa 'traveling support.

' a pairof inclined-cam dogs on 'said support,

asingle :element fadapted to be moved back Y andfortli yin a singleplane by' said cam dogs, and mechanism operatedfby said single 'elementfor 'increasing the r'speed and changing tliedirection of travel vuponmovementv of said element in one Ydirection in said plane vand`reduction of speed Vupon movement of saidelem'ent intlie `oppositedirection "in s'aid` p`lane,saidfcam dogs bein'grfar'- ranged to movesaid element' back and forth once during travel of the-support in eachdirection.

9. Feed control -inechanisi'n vof the character described comprising atraveling 'support 'adapted fto'be movedfback and forth, cam dogs on the"support, an element adapted to be movedfb'ack and forth in -a singleplane by sai'dcam dogs, and mechanism including achan'ge-speed deviceand a'reversinrg dev-ice operated by said element for effecting Arapid,

reverse of the traveling supportupon movei site direction. f

ment of theelemen't in one direction andzreduction (if-speed whenAmovedvin the oppo- 10. Feed Control mechanism of thecliaracterdescribed Vcomprising la traveling support adapted toV be moved backandforth7 cam vdogs on the support, 1an element adapted to bevmov-'ed upa'ndjdovvn said cam` idolen and mechanism including a lchangespeed4device *and a'"reversing` `device oper-` ated by said element forleffecting"rapid.re-v

verse ofthetraveling support upon movement-of Vth'e'element in onedirection in said i plane and reduction of speed when moved in ytheopposite direction in said plane, saidV cam dogs comprising end dogsvforeffecting said rapid reverse and intermediate dogs for effecting saidspeed reduction.

y11. Feed control mechanism of the characterv described comprising atable, mechanism for feeding the table back andforth at rapidtraverseand feed speeds duringebotli strokes, @am dogs onthe table, anelementr adapted foibe-*moved in r a single p'l-anejiii lopvposifte"directions by' said dogs,` and'means Vin'- cludinga change-speed'device 1and-ia reversing device operated Vby said element by movementfof the latter vin onel Vdirection to produce Said-'rapid traverse and.feeclsp`ee ds during 'the' forward stroke .ofthe `tablejand in theopposite directionV for vprod uciir'g' sai-d rapid traverse 'and feedspeeds .-duning the Vreverse stroke. c y c Y l2.' Feedcont'rolvrmechanism of the-charl acter described comprising `driving` mechanismincluding 'a shiftable reversing' clutch element and a change-speedclutchele'ment, a Y traveling support adapted'. toglie. vmoved.

back and forth by saidfmechanism, lcams -on said support,`a singleelement kadaiited to be actuated 'by said cams,V andjmeans actuatedbyvsaid cam elementby movement thereof in one direction to,en'g.ragebotli of y'said clutch elements to move said supportat one fs'peed inonedirection and by movement in the opposite diiectionfor movingjonly oneofsaidf clutch elements to" change ythe vspeed `of said support in the:same vdirection'of travel.' i

'13.l Feed 'control vmechanism of fthe chai'- acterdescribedcoi'npri'singir in" `'conubinatiou with a traveling ysimportadaptedjt'o Ibe moved back and forth.y -niechanismincluding`change-speed and; reversin,g-` clutches :for moving said support backand kforth atdif-'L ferent Yspeeds. cams on said support', and -amotion-train f'havingfan operatingV element `adapted' to ,tbeoperatedbv` said cams for movement lin* onedirection Vto operate oner'of said clutc'liesforv reversingtheftravel of said support at ,rapidvtraverse fspeed and in the opposite directionV for .i simultaneouslyoperating' bothiclu'tches for ni'ov-ing said Support at a reduced "speedin the same direction of travel.. f

14.y Feed control` mechanism ofthe charV acterV described comprisingatr'aveling sup.-

port ladapted to bemoved back and forth7 a drivingv and a drivenshafngearing between twill lo?? p iis said'shafts includinlkareversingfclvutcli and :a cliange-speed'clutch,"a `connection between ithe driven shaftanfdsaid support: 'forifaropelling;v the latter, camdogs onsaid support, and a' member adapted'to be inoved ijn a singleplane in one direction vsaid-cam dogs for operating said clutches to'produce rapidreverse of lsaid support va'teaclilend,"of itsftravel,and-to be movedfin tlieoppqsite.

direction 'bysaid' caniv .dogs .forJ operatingjv isi-i said clutchestoreducethe speed of saidy supl.,

port in thesame directioiiof travel.

'15. Control mechanism of the character.LA

described comprising a traveling support, mechanismufor propelling it'at different-y speeds and in different directions including aychange-speed device andl a reversing device,;

cani dogs onv the support, 'and mechanism including a part adapted-tobel moved backl andfortli a single pla-ne by Said cani dogs andconnectedWith said,propelling'mechaf movement ot the support for operati uismfortransmitting; movement thereto tor controlling' the operation of bothvsaid devices asto speeds and direction ottravel.

16Control mechanism of the kcharacter described comprising ai traveling'support,

mechanism for propelling said support in-` cluding; change-speed andVreversing` means, vcam dogs 'on the support,l and means operaltivebetWeenlsaid cam dogs and said mecha o'frsaid devices at each actuationand t vother wdevice with the lirstidevice each ternate actuation.

` in a single plane andat the o .'18. In combination, a travelingsupport, propelling; mechanism therefor including,Y a changefspeedclutch and a reversing` clutcl'z, and emotion-train havingat one ,end Vasin-- ,ele operatingpart movable back and forth zite end clutch shiftertor each clutch ada :ted to be shifted in predetermined relativerelation by said .bacl and forth moven'ient of the operating' part insaid single plane.

19. In control mechanism, the combination` ot driving mechanismincluding a change-speed clutch and a reversing clutch,one'owhichvdrivesthroughA the other, and a motion-train for shiftingsaid clutches including' 'an operating' Ymember movable back and forthin a vsingle plane'itorshifting` one ot the clutches upon movement inone direction, and for sfhiting` both clutches upon n'iovement in theopposite direction;

20. ln control. mechanism the ,combination of a traveling;` support,mechanism for propelling it including a changespeed clutch and areversing clutcli,1cam dogs on thesupport, and means Vfor 'shifting saidclutches including` a part adapted to be moved'baclr and forth in asinglev planerby said 'cam dogs forr shiftingboth clutches Whenmoved inY{one'direction and only oneclutch rwhenV moved in the'other direction.A

2l. Controlniechanism of the Acharacter described comprising incombination`v With bei iq saidmechanismAincludinga part adapted to b lemoved back andy `forthfin a single Vplane movement or"l the support forcontrolling le operation of said mechanism to effect change in directionof travel o1 the support and change ot speed in eachv direction;

Y3a The combination or a traveling supj t, mechanism for *propelling it.at. diff ent speeds and in diierent directions, am dogon each endportion of the support, one `orrrnore intermediatey cam dogs, and meansincluding` a part operable in a @il il said part in said planeand theinter ne liate cam dogsfor moving .it in the ope direction in saidplane, yandvsaid ns heingconstructed' vtor so;k operating; laidmechanism l ie propelled a diierent speedA and rev in direction whenactuatedby said end dogs and at aidiiterent speed 'only' When actuatedbyY said intermediate-dogs. I

r"he combination of a traveling supi-*-VV nort, mechanism or propelling-1t including' a change speed clutch and areversing clutch, plurality ofcam dogs on the supporta l crank lever mounted so `thatonevarm s adaptedto be moved back andfforthby said cam dogma rod pivotally connected tothe arm, a shifter for each clutch, acom-v pensatiiig` iconnectionbetween saidv rod Vand 'oneoli the Shifterspermittingthe cam-operatedend of the bell eranlr t0 ride over' one or more ofA said'cain dogs' 1n,a clearanceA action Without operating said shifter, and "a connectionbetween the Shifters of both .file plane adapted to be actuated by saiddogs. torcontroll1ng`fsaid mechanisnn, ci cam dogs being adapted forneov-A as to cause the support to im i clutches whereby one will beishifted at each alternate shit-ting` of thefother.

nasnrxiiroiitnvvntt;

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,599,204, grantedSeptember 7 1926, upon thel application of Harry J. Caldwell, ofRockford, Illinois, for an improvement in Feed-Control Mechanism forReciprocating Type Machines, errors appear in the printed specifica-tionrequiring correction as follows: Page 5, line 50,-

claim 10, for the Words up and down read back md forth, u a singleplane; page 6, line 84C, claim, 23, after the Word part insert the Wordsn one direction only; and that the said Letters Patent should be readwith these corrections therein that the same may conform to the recordof the case in the Patent Oiicel.

Signed and sealed this 5th day, of October, A. D. 1926.

[SEAL] A M. J. MOORE,

Acting @owww'ssz'oner of Patents.

